21699386 has 8 divisors (see below), whose sum is σ = 32853600. Its totient is φ = 10748188.

The previous prime is 21699371. The next prime is 21699397. The reversal of 21699386 is 68399612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50486 + ... + 50913.

It is an arithmetic number, because the mean of its divisors is an integer number (4106700).

Almost surely, 2^21699386 is an apocalyptic number.

21699386 is a deficient number, since it is larger than the sum of its proper divisors (11154214).

21699386 is a wasteful number, since it uses less digits than its factorization.

21699386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101508.

The product of its digits is 139968, while the sum is 44.

The square root of 21699386 is about 4658.2599755703. The cubic root of 21699386 is about 278.9218144847.

The spelling of 21699386 in words is "twenty-one million, six hundred ninety-nine thousand, three hundred eighty-six".